Two-square target detection and imaging using NR-PC flat lens

被引：0

作者：

Xu, Yang ^{[1
]}

Lian, Yingfei ^{[2
]}

Shen, Tinggen ^{[1
,2
]}

Meng, Wenjuan ^{[1
]}

Wang, Feifei ^{[2
]}

Li, Zhenghua ^{[3
]}

Yuan, Baoguo ^{[2
]}

Huang, Ming ^{[1
]}

Wang, Gang ^{[1
]}

机构：

[1] Jiangsu Univ, Dept Telecommun Engn, Zhenjiang 212013, Peoples R China

[2] Jiangsu Univ, Inst Appl Phys, Zhenjiang 212013, Peoples R China

[3] Zhenjiang Watercraft Coll, Commun T&R Sect, Zhenjiang 212013, Peoples R China

来源：

OPTICAL AND QUANTUM ELECTRONICS | 2011年 / 42卷 / 6-7期

关键词：

Negative effective index; Minimum distinguishable distance; Two-target dynamic scanning; NEGATIVE REFRACTION; PHOTONIC CRYSTALS; INDEX; VERIFICATION;

D O I：

10.1007/s11082-011-9466-7

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The characteristics of two-target detection and imaging from negative-refraction photonic crystal (NR-PC) flat lens are studied by using the two-dimensional finite-difference time-domain method. It is demonstrated that due to the influence of the mini-forbidden band and resonance excitation effect, high transmissivity will appear at the normalized resonance frequency of 0.3068 when the lightwave goes through the NR-PC lens. Meanwhile, the use of the NR-PC lens may introduce at least fourfold improvement of the refocusing resolution, if compared to the directly backscattered lightwave without using the NR-PC lens. In addition, by giving a defination for two-target minimum distinguishable distance, we further investigate the performance of two-target detection and imaging system using the proposed focus-scanning scheme. The results show that the smaller the size of the target pair is, the weeker the interference between the two targets will be, which results in a better performance in the minimum distinguishable distance.

引用

页码：347 / 357

页数：11

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